The authors, Matt Apuzzo and Adam Goldman, two AP reporters who won a Pulitzer Prize for their reporting on the New York City Police Department's surveillance of Muslims, gave an interview to "The Gothamist" and it's definitely worth a read. For example, the authors say that some police officials essentially said "Hey look we
have to think differently about activities that would be protected by
the First and Fourth Amendments because they could actually be
precursors to terrorism." As one author responds: "That's just an incredible thing, when you think about the fact that a
municipal police department is taking it upon itself [to decide] that
constitutionally-protected speech is a warning sign for terrorism."

The authors state that their book is well-sourced, and indeed, the book has a companion website with maps and documents.

The authors will be appearing with Don Borelli, Former FBI Assistant Special Agent in Charge of the New York Joint Terrorism Task Force, at the Brennan Center for Justice in NYC on September 16, 2013. Info and rsvp here.